As he grew up he is described as being of about the middle height, of remarkably active frame, and with a mobile countenance, which, though the features were not regular, was full of expression and vivacity. He had bright, wavy, brown hair, and eyes 'tremulous with light;' and his voice so improved by cultivation and experience that it became remarkably melodious. When to this are added his wonderful talents, his grand discoveries, and his eloquence, his sanguine temperament, his purpose firm, his spirits singularly cheerful and elastic, and his disposition ever philanthropic, it will easily be believed that his society was sought by all classes; and it is not to be wondered at if the attractions which such opportunities presented laid him open to the charge (from some quarters) of cultivating too much the wealthy and the powerful.[104] Davy, however, was too wise not to perceive the advantage of interesting such persons in the pursuits to which he was himself through life devoted. But he was really fond of intelligence in all classes, whenever and wherever he met with it; and there is an amusing story told of one of his street acquaintances, who showed the moon through a telescope, and who always refused to take Davy's penny, because, as the man said, of their being 'brother philosophers.' But, to return to his youthful days. Davy's schooling probably did not cost his parents much, for in Dr. Cardew's time the charges were only £18 a year for board, and £4 for teaching, and perhaps some of these were paid by a very kind friend of the family, Mr. John Tonkin of Penzance. He 'put on harness' in 1793, when little more than fourteen years old (the year before his father died), by being articled on 16th February, to Dr. J. B. Borlase of Penzance, a gentleman who seems to have taken a kind and appreciative interest in the welfare of the lad.